{
  "bibcode": "2021GCN.30021....1P",
  "body": "D. M. Palmer (LANL), S. D. Barthelmy (GSFC),\nJ. R. Cummings (CPI), A. D'Ai (INAF-IASFPA),\nH. A. Krimm (NSF), S. Laha (GSFC/UMBC),\nA. Y. Lien (GSFC/UMBC), C. B. Markwardt (GSFC),\nT. Sakamoto (AGU), M. Stamatikos (OSU),\nT. N. Ukwatta (LANL) (i.e. the Swift-BAT team):\n\nUsing the data set from T-240 to T+962 sec from the recent telemetry\ndownlink, we report further analysis of BAT GRB 210515C (trigger #1048618)\n(D'Ai et al., GCN Circ. 30020).  The BAT ground-calculated position is\nRA, Dec = 1.106, -14.972 deg which is\n   RA(J2000)  =  00h 04m 25.4s\n   Dec(J2000) = -14d 58' 18.2\"\nwith an uncertainty of 2.0 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 100%.\n\nThe mask-weighted light curve shows a weak pulse that starts at\n~T-3 s, peaks at ~T+1 s, and ends at ~T+11 s, with some tail emission\nlasting until ~T+60 s. T90 (15-350 keV) is 55.7 +- 26.7 sec (estimated\nerror including systematics).\n\nThe time-averaged spectrum from T-2.53 to T+56.90 sec is best fit by\na simple power-law model.  The power law index of the time-averaged\nspectrum is 1.26 +- 0.28.  The fluence in the 15-150 keV band is\n5.9 +- 1.1 x 10^-7 erg/cm2. The 1-sec peak photon flux measured from\nT+0.84 sec in the 15-150 keV band is 0.6 +- 0.2 ph/cm2/sec.\nAll the quoted errors are at the 90% confidence level.\n\nThe results of the batgrbproduct analysis are available at\nhttp://gcn.gsfc.nasa.gov/notices_s/1048618/BA/",
  "circularId": 30021,
  "createdOn": 1621130506000,
  "email": "amy.y.lien@nasa.gov",
  "subject": "GRB 210515C: Swift-BAT refined analysis",
  "submitter": "Amy Lien at GSFC  <amy.y.lien@nasa.gov>",
  "eventId": "GRB 210515C"
}